Centrifugal pulverizer.



CENTRIFUGAL PULVERIZER. .APPLICATION FILED APILB, 1914. RENEWED ocT. '21. |916.

Patented Apr. 10, 1917.

2 SHEETS-SHEET I.

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I CENTRI L ERIZER. I APPLICATION FILED AP 914. RENEWED OCT. 2l. |916. mmm Patent@ CENTRIFUGAL PULVERIZER.

Specification of Letters Patent.

. Patented am. io, reir.

Application led April 6, 1914, Serial No. 829,988. Renewed Qctober 31, 1916. Serial No. 127,033.

To all whom it may concern."

Be it known that I, HENRY ADAMS, a'citizen of the United States, residing at Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Centrifugal Pulverizers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in centrifugal pulverizers and has for its primary'object .to provide a device of this character which may be simplyvand inexpensively constructed and which will efectually perform the functions for-which it is desi g1 ed.

i `l carrying out the above end, I provide a pair of vertically spaced tables having coacting grinding surfaces on their contiguous faces, means for rotating one'or both of said tables and means whereby the upper table is rigidly braced against vibration and yet allowed to freely rotate.

A secondary object of the invention is to construct the above mentioned grinding or pulverizing surfaces in such a manner as to cause the material, being pulverized, to be moved outwardly by centrifugal force and to be efectually pulverized on its outward course.

Still another object of the invention is to construct the bracing means for the upper table in the most simple manner consistent with the proper operation of the device.

A still further object is to construct the entire machine of as few parts as possible and to so construct the individual parts as to render them readily attachable or detachalllile for the purpose of repairing, and the l' e.

With the above objects in view, the invention resides in certain novel features of construction and combination herein described and claimed and shown in the drawings wherein Figure 1 is a vertical section of my improved pulverizing machine;

Fig. 2 is a horizontal section thereof, taken on the plane of the line 2 2 of Fig. 1;

Fig. 3 is a detail elevation of a portion of one of the grinding rings, showing the manner in which .the same may be corrugated.

In the accompanying drawings, I have illustrated my invention as comprising in Ato be treated to the lower table and means whereby either or both of said tables may be rotated.

The upper table 1 is preferably of circular formation and is constructed of a solid metal plate having a pair of upwardly and inwardly inclining openings 6 through whichtubes 7 pass and enter the lower end of a pan 8 which revolves with a shaft 9 to which the table 1 is rigidly ke ed. Thus it will be seen that any material ed to the pan 8, by a pipe 10 or other suitable means, will descend through the tubes 7 and will be discharged upon the lower table 2.

As above suggested, the table 1 is pro-l vided with supporting and bracin legs 5, said legs being here shown as lnclining downwardly and outwardly from the periphery of said table and carrying anti-friction rollers 11 on their lower ends, said rollers running upon an annular track 12. By the provision of the legs 5 and their mounting, it will be seen that the table 1 is rigidly braced against tilting, the expediency of this provision becoming apparent as the specication proceeds.

The pulverizing rings 3 are here shown as being concentrically arranged and of right angle triangular shape in cross section, their hypotenuses 13 inclining upwardly and outwardly while their altitudes 14 are disposed in vertical planes. The inclined and vertical surfaces 13 and 14 coact with similar surfaces'13 and 14 which are formed by constructing the rings- 4 in the same manner as the rings 3 with the exception that the hypotenuses of said rings 4 incline downwardlyl and inwardly fromtheir altitudes while the hypotenuses of the rings 3, as above stated, incline outwardly and upwardly from their altitudes.

By reference more particularly to Fig., 1, it will be seen that the rings 3 and 4 intermesh when the parts are properly arranged and that said rings are rendered readily detachable by means of bolts 15,

As will be hereinafter -more clearly set forth, the table 2 rotates at a greater speed Athan the table l'and infact, the table 1 need not bevrotated at all when pulverizing certain materials. I have illustrated table 2 i pending as comprising a circular metal top 16 which is of less thickness than the table 1 and is provided with a central hub 17 from which bracing ribs 18 radiate, said ribs serving to impart the necessary rigidity to the table 2.

For the purpose of rigidly and revolubly supporting the table 2, I provide an upright bearing shaft 19 which is rigidly keyed within the hub 17, depends therefrom and is revolubly mounted in a rigid bearing 20, a pulley 21 being provided for the purpose of transmitting power to said shaft .from a source not shown. i

With the parts as above described, the operation of the invention is as follows: The material, to be pulverized, is fed through the pipe 10 and into the pan 8 from which it is discharged through the tubes 7, onto the innermost ring 4 of the table 2,

which table is now. being swiftly rotated. P

said table 2 will cause theV The rotation of material deposited thereon to be thrown outwardly by centrifugal force. On its outward movement, said material rides successively up the inclined surfaces 13 of the rings 4 and falls upon the next inclined surface. The surfaces 13 and 13 and 14 and 14 now coact to cause the numerous particles of the material to contact with each other, a rolling motion being imparted to said particles which eifectually pulverizes the same.

As the material nears the outer edge of the table 2, the centrifugal force is of course increased and the pulverizing action is also increased, thus completely pulverizing the material by the time it leaves'the table 2.

For the purpose of receiving the material, discharged from said table 2, I provide a rigidly supportedzftrough or launder 22 which is disposed'below the' edge of said table while the discharged material is -directed into said launder by means of a deskirt 23 which is carried by the table 1.

- If found desirable, the upper table l may be rotated by means of a suitable pulley24 to which power may be applied. When said n table 1 is being revolved it becomes necessary to impart reverse movements to said tablesl and 2. It is duringr the rotary movement of the table 1, that the rollers 11 and track 12 come into action.

In Fig. 3, I have illustrateda portion of a pulverizing ring 3 which is slmllar in construction to the rings 3 and 4-with the eX- ception that its active face is corrugated as.

tion and operation of the various other features of the invention, Will be readily understood without requiring a more extended explanation. l

I have described my invention with considerable minuteness but I do not wish to be limited to details of construction, proportioning of parts or other minor features other than those amplified in the appended claims.

Having thus particularly described my invention, what I desire to obtain by Lettersatent is v 1. A centrifugal pulverizer comprising a pair of rotatably mounted vertically spaced tables provided on their opposed faces with laterally spaced concentric annular detachably mounted grinding 'elements in the form of ribs triangular in cross section, those on one table being arranged opposite the spaces between those on the other, means for feeding material to the lower table, and means for rotatingsaid tables.

2. In .a centrifugal pulverizer, the combination with a support and an annulartrack thereon; of a table mounted for. rotationon said support, an 'additional table spaced above the aforesaid table and having outwardly inclined legs thereon, rollers on the lower ends of said legs and received on said track to rotatably support the last mentioned table thereon, the inner opposed faces of said tables having annular concentric grinding ribs removably secured thereto, said ribs being triangular in cross section and those on one table being arranged opposite the spaces between those on the other, means for feeding material to the lower table and means for rotating said tables.

In testimony whereof I have hereunto set my hand in presence of two subscribing ,witnesses.

HENRY ADAMS.

Witnesses LINCOLN TAYLOR, HARRY B. NEvUs. 

